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APPENDIX C: GLOBAL VARIABLES

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IDL REFERENCE MANUAL

Appendix C

Global variables and their initial values

The following global variables are defined when IDL is started. Some of them are designed for the user to change, so as to affect the behavior of various IDL functions. Others are just defined to provide the user with an easy way of specifying some value as input to a function. The latter include ALL and the mathematical constants, and cannot be meaningfully changed by the user.

Variable Initial valueSection

ALLALL2.1.1

E2.7182823.2
HISTRPTLINES56.3
LABELPRINTFLAG42.4
PI3.1415933.2
PLOT.AXIS.RATIO0.66.4
PRECISION(4 3)2.4
ROWLABELWIDTH82.4